Robbins, W. G. (2001). The great Northwest: The search for regional identity. Oregon State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRobbins, William G. The Great Northwest: The Search for Regional Identity. Corvallis: Oregon State University Press, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRobbins, William G. The Great Northwest: The Search for Regional Identity. Oregon State University Press, 2001.
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